Henby barbatt



(No Model.)

H. BARRATT.

A GAR BRAKE. NO. 288,398.` A Patented NOV'. 13, '1883.

UNITED STATES PATENT OFFICE.

HENRY BARRATT, OF YORK, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO JACOB O.MILLER, OF SAME PLACE. Y Y i CAR-BRAKE.

SPECIFICATION forming part ofLetters Patent No. 288,398, dated November13,. 1883.

` Application filed September 1, 1883. (No model.)

1"0 all wibo/12, 25 'may concern:

Be it known that I, HENRY BARRATT, a citizen of the United States, andaj resident of York, county of York, and State of Pennsylvania, haveinvented certain new and useful Improvements in Car-Brakes, of which thefollowingis a specification.

My invention relates to that class of carbrakes in which the pressure ofair, steam, or other fluid is made the means of operating the brake, andhas for its object to supply each car with means of applying the brakeindependent of the usual connection to the locomotive or other source ofpower; and to this end my invention consists in locating upon a carauxiliary operating means connected directly with the main tube of theordinary brake apparatus, whereby the brake may be operated by eitherthe main or auxiliary source of power, or by both at the same time.

The invention is designed more particularly as an adjunct to and animprovement upon the brake shownand described in my patent numbered 283,368, and dated August 21, 1883, although it may be applied to any brakebelonging to the class mentioned.

In the drawings, Figure l is a side view of a part of a car, showing myimprovement 5 and Fig. 2 is a modification. 4

In order to more particularly describe my present invention, I haveshown it as applied to a brake similar to the one shown in my patentabove referred to.

The car-body is supported upon the usual trucks, one of which is shownin the drawings, having a frame of the usual construction. To this frameis attached a central cross-beam, A, vfrom which the brake bars or.beams D are suspended by links a.

The shoes b are pivoted to the beam, so as to bear against the treads ofthe wheel C. To the cross-beam A is attached one or more cylinders, E,each provided with two pistons, i,

having rods extending tothe opposite ends of the cylinder, and providedat the extremities with disks or heads e, arranged opposite the innersides of the brake-beams D. At the center of each cylinder is attached atube, F, opening into the cylinder and connected by means of aiexiblepipe to the tube G, which extends throughout the length of the car, and

the pressure is brought upon the fluid in the cylinder, the pistons z' iwill be forced outward and the brake-beams D will be carried toward thewheels until the shoes are pressed firmly against the latter, in whichcondition they will remain until the pressure is removed, when theweight of the beams and appurtenances will carry the shoes away from thewheels and bring the pistons together. Such is the usual operation ofthe class of brakes referred to in my application previously named.

It sometimes becomes necessary to detach the car from the train orlocomotive carrying the means forcontrolling the brake; or the car maybecome accidentally detached. It is then necessary to have some readyand accessible means whereby the brakes maybe applied by persons uponthe detached car. It has been usual to provide cars having the automaticbrake with the common hand-wheel, brake-levers, and connections, wherebythe car may be controlled. In place of this I have substituted meansupon each car for producing pressure upon the air, water, or otherfluid, and have connected the same to the main pipe G of the brake, sothat in case the car is detached, as above mentioned, or the source ofsupply is cut off, the requisite pressure may be quickly and easilyproduced to operate the brakes and control the movement of the car bypersons on the car itself. As illustrative of my invention, I have shownan ordinary air-pump, P, having the usual inlet and outlet valves andoperating-piston and handle, one of the valves being connected with themain pipe G. This pump may be located in any convenient and' accessiblepart of the car, and may be of any ordinary and well-known construction.From this arrangement it will be seen that in case of accident by thebreakage of connections or otherwise, ready means are furnished forcontrolling the car.

The tube G maybe provided with proper IOO stop-cocks for closingl theopenings thereof, which may be operated automatically or by hand.

In case the vacuum-brake is used, the pump P and connections would bc soarranged as to exhaust the air in thel cylinder, instead of forcing itthereinto.

Instead of areciprocating pump, other forms maybe used-as, forinstance,a rotary pumpand this may be connected by any suitable means with one ofthe car-axles in such a manner that the inertia of the car will drivethe pump and produce the pressure required to operate the brake forstopping the car. I have indicated a belt passing over a pulley on theaxle and another on the pump; but of course gears or any other suitableconnection may be used.

From the foregoing it is evident that many modifications of inyinvention may be made without departing from the principle thereof. .i Iam aware of Patent No. 184,507, November 21, 1876, and do not claimanything claimed therein.

1. The combination, with the main conducting-tube of a duid-pressurebrake, connected to the usual source of power upon the locomotive, of apump located upon the car and connected directly to/said tube, wherebythc brake may be operated by either the main or auxiliary source ofpower, or by both at the same time, substantially as described.

2. The combination, with the cylinders E, provided with the pistonscarrying brakeshoes, of the main pipe G, and flexible connectionsbetween the same and the cylinder E, and the auxiliary pump l?,connected directly to the tube G, whereby the brake-shoes may beoperated directly by the main and auxiliary source of power,substantially as described.

In testimony whereof I have si gned my name to this specification in thepresence of two Subscribing witnesses.

HENRY BARRATT.

Vitncsses:

WM. BEITZEL, W. A. MILLER.

